Make the rugelach dough. Pour the flours and salt into a food processor. Pulse a couple times to combine. Sprinkle the cream cheese and butter on top, then pulse in short bursts until the mixture is curdy and crumbly. It should not come together in one cohesive dough blob! Dump onto a clean work surface and divide into 6 equal pieces. Form each one into a round disc by hand and wrap in plastic wrap. Refrigerate for at least 30 minutes or up to 2 days.,When you're ready to bake the crostatas, heat the oven to 375° F. Line two baking sheets with parchment or silicone baking mats.,Make the cherry filling. Combine the cherries, sugar, 1 tablespoon cornstarch, salt, and cayenne in a bowl. Toss with a spoon or by hand until well mixed. Let hang out while the oven preheats. In another bowl, combine the blue cheese and remaining 1 tablespoon cornstarch and toss to combine.,I like to form one crostata at a time, this way the rolled-out dough doesn't get too warm. Roll one rugelach disc into a roughly 6-inch circle. Fill the center with roughly 2 tablespoons crumbled blue cheese. Flat into an even layer (it shouldn't fill the entire circle). Top with roughly 1/3 cup cherry filling. Again, flatten out (and again, it shouldn't fill the entire circle). Then crimp the edges closed. Put on the prepared baking sheet.,Repeat with the remaining 5 rugelach discs.,______